line 1 column 1 - Warning: missing <!DOCTYPE> declaration
line 8 column 1 - Warning: discarding unexpected <frame>
line 10 column 1 - Warning: missing </noframes>
line 3 column 3 - Warning: blank 'title' element
line 5 column 1 - Warning: <frameset> element removed from HTML5
line 6 column 3 - Warning: <frame> element removed from HTML5
line 10 column 1 - Warning: <noframes> element removed from HTML5
Info: Document content looks like HTML5
Tidy found 7 warnings and 0 errors!

About HTML Tidy: https://github.com/htacg/tidy-html5
Bug reports and comments: https://github.com/htacg/tidy-html5/issues
Official mailing list: https://lists.w3.org/Archives/Public/public-htacg/
Latest HTML specification: https://html.spec.whatwg.org/multipage/
Validate your HTML documents: https://validator.w3.org/nu/
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Do you speak a language other than English, or a different variant of 
English? Consider helping us to localize HTML Tidy. For details please see 
https://github.com/htacg/tidy-html5/blob/master/README/LOCALIZE.md